/*
 *  Copyright (c) 2007,2008, 2009 INRIA, UDcast
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Mohamed Amine Ismail <amine.ismail@sophia.inria.fr>
 *                              <amine.ismail@udcast.com>
 */

// Default network topology includes:
// - A base station (BS)
// - Some number of SSs specified by the variable nbSS (defaults to 10)
// - A multicast router (ASNGW)
// - A multicast streamer

// Two Lans are setup: The first one between the multicast streamer and the
// ASNGW, the second one between the ASNGW (router) and the base station

//      +-----+    +-----+    +-----+   +-----+    +-----+
//      | SS0 |    | SS1 |    | SS2 |   | SS3 |    | SS4 |
//      +-----+    +-----+    +-----+   +-----+    +-----+
//     10.1.0.1   10.1.0.2   10.1.0.3  10.1.0.4   10.1.0.5
//      --------  --------    -------   -------   --------
//        ((*))    ((*))       ((*))     ((*))       ((*))
//
//                              LAN2 (11.1.1.0)
//                          ===============
//        10.1.0.11          |          |
//              +------------+        ASNGW           multicast Streamer
//       ((*))==|Base Station|          |  (12.1.1.0)   |
//              +------------+         ==================
//                                            LAN1
//
//        ((*))    ((*))       ((*))        ((*))    ((*))
//       -------   --------   --------    -------   --------
//      10.1.0.6   10.1.0.7   10.1.0.8    10.1.0.9   10.1.0.10
//       +-----+    +-----+    +-----+    +-----+    +-----+
//       | SS5 |    | SS6 |    | SS7 |    | SS8 |    | SS9 |
//       +-----+    +-----+    +-----+    +-----+    +-----+

#include "ns3/applications-module.h"
#include "ns3/core-module.h"
#include "ns3/csma-module.h"
#include "ns3/global-route-manager.h"
#include "ns3/internet-module.h"
#include "ns3/mobility-module.h"
#include "ns3/network-module.h"
#include "ns3/vector.h"
#include "ns3/wimax-module.h"

#include <iostream>
#include <vector>

using namespace ns3;

NS_LOG_COMPONENT_DEFINE("WimaxMulticastSimulation");

int
main(int argc, char* argv[])
{
    bool verbose = false;

    NodeContainer ssNodes;
    std::vector<Ptr<SubscriberStationNetDevice>> ss;
    NetDeviceContainer ssDevs;
    Ipv4InterfaceContainer SSinterfaces;

    NodeContainer bsNodes;
    Ptr<BaseStationNetDevice> bs;
    NetDeviceContainer bsDevs;
    NetDeviceContainer bsDevsOne;
    Ipv4InterfaceContainer BSinterfaces;

    UdpTraceClientHelper udpClient;
    ApplicationContainer clientApps;

    Ptr<SimpleOfdmWimaxChannel> channel;
    NodeContainer Streamer_Node;
    NodeContainer ASNGW_Node;

    Ptr<ConstantPositionMobilityModel> BSPosition;
    std::vector<Ptr<RandomWaypointMobilityModel>> SSPosition;
    std::vector<Ptr<RandomRectanglePositionAllocator>> SSPosAllocator;

    // default values
    int nbSS = 10;
    int duration = 7;
    int schedType = 0;
    WimaxHelper::SchedulerType scheduler = WimaxHelper::SCHED_TYPE_SIMPLE;

    CommandLine cmd(__FILE__);
    cmd.AddValue("nbSS", "number of subscriber station to create", nbSS);
    cmd.AddValue("scheduler", "type of scheduler to use with the netdevices", schedType);
    cmd.AddValue("duration", "duration of the simulation in seconds", duration);
    cmd.AddValue("verbose", "turn on all WimaxNetDevice log components", verbose);
    cmd.Parse(argc, argv);

    LogComponentEnable("UdpTraceClient", LOG_LEVEL_INFO);
    LogComponentEnable("UdpServer", LOG_LEVEL_INFO);

    switch (schedType)
    {
    case 0:
        scheduler = WimaxHelper::SCHED_TYPE_SIMPLE;
        break;
    case 1:
        scheduler = WimaxHelper::SCHED_TYPE_MBQOS;
        break;
    case 2:
        scheduler = WimaxHelper::SCHED_TYPE_RTPS;
        break;
    default:
        scheduler = WimaxHelper::SCHED_TYPE_SIMPLE;
    }

    ss.resize(nbSS);
    SSPosition.resize(nbSS);
    SSPosAllocator.resize(nbSS);

    ssNodes.Create(nbSS);
    bsNodes.Create(1);

    Streamer_Node.Create(1);
    ASNGW_Node.Create(1);

    WimaxHelper wimax;

    channel = CreateObject<SimpleOfdmWimaxChannel>();
    channel->SetPropagationModel(SimpleOfdmWimaxChannel::COST231_PROPAGATION);
    ssDevs = wimax.Install(ssNodes,
                           WimaxHelper::DEVICE_TYPE_SUBSCRIBER_STATION,
                           WimaxHelper::SIMPLE_PHY_TYPE_OFDM,
                           channel,
                           scheduler);
    Ptr<WimaxNetDevice> dev = wimax.Install(bsNodes.Get(0),
                                            WimaxHelper::DEVICE_TYPE_BASE_STATION,
                                            WimaxHelper::SIMPLE_PHY_TYPE_OFDM,
                                            channel,
                                            scheduler);

    BSPosition = CreateObject<ConstantPositionMobilityModel>();

    BSPosition->SetPosition(Vector(1000, 0, 0));
    bsNodes.Get(0)->AggregateObject(BSPosition);
    bsDevs.Add(dev);
    if (verbose)
    {
        WimaxHelper::EnableLogComponents(); // Turn on all wimax logging
    }

    for (int i = 0; i < nbSS; i++)
    {
        SSPosition[i] = CreateObject<RandomWaypointMobilityModel>();
        SSPosAllocator[i] = CreateObject<RandomRectanglePositionAllocator>();
        Ptr<UniformRandomVariable> xVar = CreateObject<UniformRandomVariable>();
        xVar->SetAttribute("Min", DoubleValue((i / 40.0) * 2000));
        xVar->SetAttribute("Max", DoubleValue((i / 40.0 + 1) * 2000));
        SSPosAllocator[i]->SetX(xVar);
        Ptr<UniformRandomVariable> yVar = CreateObject<UniformRandomVariable>();
        yVar->SetAttribute("Min", DoubleValue((i / 40.0) * 2000));
        yVar->SetAttribute("Max", DoubleValue((i / 40.0 + 1) * 2000));
        SSPosAllocator[i]->SetY(yVar);
        SSPosition[i]->SetAttribute("PositionAllocator", PointerValue(SSPosAllocator[i]));
        SSPosition[i]->SetAttribute("Speed",
                                    StringValue("ns3::UniformRandomVariable[Min=10.3|Max=40.7]"));
        SSPosition[i]->SetAttribute("Pause",
                                    StringValue("ns3::ConstantRandomVariable[Constant=0.01]"));

        ss[i] = ssDevs.Get(i)->GetObject<SubscriberStationNetDevice>();
        ss[i]->SetModulationType(WimaxPhy::MODULATION_TYPE_QAM16_12);
        ssNodes.Get(i)->AggregateObject(SSPosition[i]);
    }

    bs = bsDevs.Get(0)->GetObject<BaseStationNetDevice>();

    CsmaHelper csmaASN_BS;
    CsmaHelper csmaStreamer_ASN;

    // First LAN BS and ASN
    NodeContainer LAN_ASN_BS;

    LAN_ASN_BS.Add(bsNodes.Get(0));

    LAN_ASN_BS.Add(ASNGW_Node.Get(0));

    csmaASN_BS.SetChannelAttribute("DataRate", DataRateValue(DataRate(10000000)));
    csmaASN_BS.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
    csmaASN_BS.SetDeviceAttribute("Mtu", UintegerValue(1500));
    NetDeviceContainer LAN_ASN_BS_Devs = csmaASN_BS.Install(LAN_ASN_BS);

    NetDeviceContainer BS_CSMADevs;

    BS_CSMADevs.Add(LAN_ASN_BS_Devs.Get(0));

    NetDeviceContainer ASN_Devs1;
    ASN_Devs1.Add(LAN_ASN_BS_Devs.Get(1));

    // Second LAN ASN-GW and Streamer

    NodeContainer LAN_ASN_STREAMER;
    LAN_ASN_STREAMER.Add(ASNGW_Node.Get(0));
    LAN_ASN_STREAMER.Add(Streamer_Node.Get(0));

    csmaStreamer_ASN.SetChannelAttribute("DataRate", DataRateValue(DataRate(10000000)));
    csmaStreamer_ASN.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
    csmaStreamer_ASN.SetDeviceAttribute("Mtu", UintegerValue(1500));

    NetDeviceContainer LAN_ASN_STREAMER_Devs = csmaStreamer_ASN.Install(LAN_ASN_STREAMER);

    NetDeviceContainer STREAMER_Devs;
    NetDeviceContainer ASN_Devs2;
    ASN_Devs2.Add(LAN_ASN_STREAMER_Devs.Get(0));
    STREAMER_Devs.Add(LAN_ASN_STREAMER_Devs.Get(1));

    MobilityHelper mobility;
    InternetStackHelper stack;
    mobility.Install(bsNodes);
    stack.Install(bsNodes);
    mobility.Install(ssNodes);
    stack.Install(ssNodes);
    stack.Install(Streamer_Node);
    stack.Install(ASNGW_Node);

    Ipv4AddressHelper address;

    address.SetBase("10.1.0.0", "255.255.255.0");
    bsDevsOne.Add(bs);
    BSinterfaces = address.Assign(bsDevsOne);
    SSinterfaces = address.Assign(ssDevs);

    address.SetBase("11.1.1.0", "255.255.255.0");
    Ipv4InterfaceContainer BSCSMAInterfaces = address.Assign(BS_CSMADevs);
    Ipv4InterfaceContainer ASNCSMAInterfaces1 = address.Assign(ASN_Devs1);

    address.SetBase("12.1.1.0", "255.255.255.0");
    Ipv4InterfaceContainer ASNCSMAInterfaces2 = address.Assign(ASN_Devs2);
    Ipv4InterfaceContainer StreamerCSMAInterfaces = address.Assign(STREAMER_Devs);

    Ipv4Address multicastSource("12.1.1.2");
    Ipv4Address multicastGroup("224.30.10.81");

    Ipv4StaticRoutingHelper multicast;
    // 1) Configure a (static) multicast route on ASNGW (multicastRouter)
    Ptr<Node> multicastRouter = ASNGW_Node.Get(0); // The node in question
    Ptr<NetDevice> inputIf = ASN_Devs2.Get(0);     // The input NetDevice

    multicast.AddMulticastRoute(multicastRouter,
                                multicastSource,
                                multicastGroup,
                                inputIf,
                                ASN_Devs1);

    // 2) Set up a default multicast route on the sender n0
    Ptr<Node> sender = Streamer_Node.Get(0);
    Ptr<NetDevice> senderIf = STREAMER_Devs.Get(0);
    multicast.SetDefaultMulticastRoute(sender, senderIf);

    // 1) Configure a (static) multicast route on ASNGW (multicastRouter)
    multicastRouter = bsNodes.Get(0); // The node in question
    inputIf = BS_CSMADevs.Get(0);     // The input NetDevice

    multicast.AddMulticastRoute(multicastRouter,
                                multicastSource,
                                multicastGroup,
                                inputIf,
                                bsDevsOne);

    uint16_t multicast_port = 100;

    UdpServerHelper udpServerHelper = UdpServerHelper(multicast_port);
    ApplicationContainer serverApps;
    serverApps = udpServerHelper.Install(ssNodes);
    serverApps.Start(Seconds(6));
    serverApps.Stop(Seconds(duration));

    udpClient = UdpTraceClientHelper(multicastGroup, multicast_port, "");

    clientApps = udpClient.Install(Streamer_Node.Get(0));
    clientApps.Start(Seconds(6));
    clientApps.Stop(Seconds(duration));

    IpcsClassifierRecord MulticastClassifier(Ipv4Address("0.0.0.0"),
                                             Ipv4Mask("0.0.0.0"),
                                             multicastGroup,
                                             Ipv4Mask("255.255.255.255"),
                                             0,
                                             65000,
                                             multicast_port,
                                             multicast_port,
                                             17,
                                             1);

    ServiceFlow MulticastServiceFlow = wimax.CreateServiceFlow(ServiceFlow::SF_DIRECTION_DOWN,
                                                               ServiceFlow::SF_TYPE_UGS,
                                                               MulticastClassifier);

    bs->GetServiceFlowManager()->AddMulticastServiceFlow(MulticastServiceFlow,
                                                         WimaxPhy::MODULATION_TYPE_QPSK_12);

    Simulator::Stop(Seconds(duration + 0.1));
    NS_LOG_INFO("Starting simulation.....");
    Simulator::Run();

    for (int i = 0; i < nbSS; i++)
    {
        ss[i] = nullptr;
        SSPosition[i] = nullptr;
        SSPosAllocator[i] = nullptr;
    }

    bs = nullptr;

    Simulator::Destroy();
    NS_LOG_INFO("Done.");

    return 0;
}
